Build me a custom nft collection

I would also like to make the NFTs affordable and for there to be different types of NFTS (basic, bronze, silver, gold, and platinum) there will be thousands of basic NFTs but as you go up the categories the rarer they get the basic nfts will have the same skill but as you go up the classes the more special skills they have (dealing more damage to opponents, enable extra shield for certain amounts of time etc).